What happened to main/master audio?

Hey, gang- I'm not tech savy with Davinci Resolve, I just use it for simple editing.
I upgraded to Davinci Resolve 17 & see the master/main audio that was in the Editing tab, Mixer section has been replaced by Bus 1 & 2/sidechain?
Does anyone know where the master audio went? I like to push that up a bit before rendering my videos. Picture attached. I've been looking in the manual & online & haven't heard anywhere about this change.
Thanks in advance for the assist!!
I upgraded to Davinci Resolve 17 & see the master/main audio that was in the Editing tab, Mixer section has been replaced by Bus 1 & 2/sidechain?
Does anyone know where the master audio went? I like to push that up a bit before rendering my videos. Picture attached. I've been looking in the manual & online & haven't heard anywhere about this change.
Thanks in advance for the assist!!